package com.itcs.app.util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ConnectException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;

import org.apache.http.HttpEntity;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

/**
 * 公众平台通用接口工具类
 * 
 * @author V3芳
 *
 * @date 2015-3-4
 */
public class HttpUtil {

	/**
	 * 发起https请求并获取结果
	 * 
	 * @param requestUrl
	 *            请求地址
	 * @param requestMethod
	 *            请求方式（GET、POST）
	 * @param outputStr
	 *            提交的数据
	 * @return JSONObject(通过JSONObject.get(key)的方式获取json对象的属性值)
	 */
	public static String httpRequest(String requestUrl, String requestMethod, String outputStr) {
		StringBuffer buffer = new StringBuffer();
		String mytext2 = "";
		try {
			// 创建SSLContext对象，并使用我们指定的信任管理器初始化
			TrustManager[] tm = { new MyX509TrustManager() };
			SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
			sslContext.init(null, tm, new java.security.SecureRandom());
			// 从上述SSLContext对象中得到SSLSocketFactory对象
			SSLSocketFactory ssf = sslContext.getSocketFactory();

			URL url = new URL(requestUrl);
			HttpsURLConnection httpUrlConn = (HttpsURLConnection) url.openConnection();
			httpUrlConn.setSSLSocketFactory(ssf);

			httpUrlConn.setDoOutput(true);
			httpUrlConn.setDoInput(true);
			httpUrlConn.setUseCaches(false);
			// 设置请求方式（GET/POST）
			httpUrlConn.setRequestMethod(requestMethod);

			if ("GET".equalsIgnoreCase(requestMethod))
				httpUrlConn.connect();

			// 当有数据需要提交时
			if (null != outputStr) {
				OutputStream outputStream = httpUrlConn.getOutputStream();
				// 注意编码格式，防止中文乱码
				outputStream.write(outputStr.getBytes("UTF-8"));
				outputStream.close();
			}

			// 将返回的输入流转换成字符串
			InputStream inputStream = httpUrlConn.getInputStream();
			InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
			BufferedReader bufferedReader = new BufferedReader(inputStreamReader);

			String str = null;
			while ((str = bufferedReader.readLine()) != null) {
				buffer.append(str);
			}
			bufferedReader.close();
			inputStreamReader.close();
			// 释放资源
			inputStream.close();
			inputStream = null;
			httpUrlConn.disconnect();
			mytext2 = java.net.URLDecoder.decode(buffer.toString(), "utf-8");

		} catch (ConnectException ce) {

		} catch (Exception e) {

		}
		return mytext2;
	}

	/**
	 * 无论GET或POST都用POST请求
	 * 
	 * @param requestUrl
	 * @param outputStr
	 * @return
	 */
	public static String doPost(String requestUrl, Map<String, String> map) {
		CloseableHttpClient client = HttpClients.createDefault();
		CloseableHttpResponse response = null;
		HttpPost post = new HttpPost(requestUrl);
		String result = "";
		HttpEntity entity = null;
		try {
			List<BasicNameValuePair> parameters = new ArrayList<>();
			Set<String> keySet = map.keySet();
			Iterator<String> it = keySet.iterator();
			while (it.hasNext()) {
				String key = it.next();
				parameters.add(new BasicNameValuePair(key, map.get(key)));
			}
			UrlEncodedFormEntity en = new UrlEncodedFormEntity(parameters, "utf-8");
			post.setEntity(en);
			response = client.execute(post);
			entity = response.getEntity();
			result = EntityUtils.toString(entity, "utf-8");
		} catch (IOException e) {
		} finally {
			try {
				response.close();
				client.close();
			} catch (IOException e) {
			}
		}
		return result;
	}

}